Warp stop mechanism for looms



July 2, 1929. l. w. NOYES WARP STOP MECHANISM FOR LOOMS Filed May 1, 1928 gun in WWW A T TQRNEY Patented July 2, 1929.

UNITED I STATES 1,719,234 PATENT .OFFIGE.

IRA W. NOYES, OF IIOIPEDALE, MASSACHUSETTS, ASSIGNCR TODRAIPER CORPORA- TION, 0F HOPEDALE, MASSACHUSETTS, A CORPORATION OF MAINE.

WARP STOP MECHANISM FOR LOQMS.

Application filed May 1, 1928.

able detector bar.

It frequently happens during weaving or manipulation of the loom by the attendant, that one or more of the detecting bars may become accidentally detached from its link connection with its actuator, because the link is connected to the detector bar by an open slot and may be readily, through accident or otherwise, detached therefrom. Should this occur and the loom be started, the detector bar thus detached from its actuator would fail to function, with the result that no detection of the warp fault in the series of drop wires associated with such detector bar would occur, and imperfect cloth is liable to be woven.

One of the important features of the present invention therefore consists in providing a simple yet effective lock for securing the detector bar to the link connection between it and its actuator, so that accidental detachmentof the link from the detectorbar is rendered impossible, or substantially so.

The invention and novel features thereof will best be made clear from the following description and the accompanying drawings of one good form thereof.

In the drawings:

Fig. 1 is a side Elevation of one end of a warp stop mechanism containing the present invention;

Fig. 2 is an enlarged perspective view of disassembled parts which more particularly include the present invention;

Fig. 3 is an enlarged side elevation showing the detector bar and link connected together; and

Fig. 4 is a section on the line l-4L of Fig. 1.

The locking connection between the trans versely movable detector bar and its actu- Serial No. 274,240.

.any usual form of warp stop mechanism wherein atransversely movable toothed dctector bar is employed, but, as illustrated in Fig. 1, for illustrative purposes, the warp stop mechanism is of the general type shown in the patent to Davis and Johnson, No. 1,538,625, dated May 19, 1925.

As more fully described in the abovementionecl patent, the warp stop mechanism comprises the usual end supports 1, one at each side of the loom, between which extend the warp rests and spacing bars 2.

Mounted in a bracket 3 extending from one of the side supports or brackets 1 is the rock shaft 4 to which is connected the arm 5 which may be actuated through a link 6 and arm 7 from any convenient going part of the loom, as, for instance, a cam onthe lower or cam shaft, as usual. Mounted for movement with the rock shaft 4t is the rocker 8, of which there may be any suitable number corresponding to the number of banks of drop wires employed, and mounted upon each of the rockers 8 is an actuator 9 havingpins 10 which rest in seats in the rockers 8 under the infiuenceof a spring 11 normally acting as set forth and more fully described in thepatent to which attention has been directed, to maintain the actuators and rockers in operative relation, and yet permit the actuator to come to rest when the transversely movable toothed detector bar to which it is connected is arrested on the occurrence of a warp fault.

Pivotally mounted on the rocker at 12 is a finger 13 connected at 14 to the associated actuator 9, the construction being such that should the actuator 9 be arrested while the rocker continues to move, the outer end portion of the finger 13 will be depressed and act through a train of mechanism to effect loom stoppage. In the present instance of the invention, the finger 13 acts upon an arm 15 which rests upon the upper end portion of a plunger 16 associated with a flexible sheathed wire 17 which, upon the occurrence of a warp fault, is moved longitudinally in its sheath, as more fully explained in the Davis and Johnson patent, to effect loom stoppage. It is not deemed necessary herein to further describe the particulars of the warp stop mechanism in detail, since these are all fully described in said patent, and the details of such mechanism constituting the main portions of the warp stop mechanism form no. essential part of the present invention.

Extendingbetween the side brackets or supports '1 of'the warp stop mechanism is the transversely movable toothed detector bar 18 having the teeth 19, and associated with the movable detector bar is the relatively fixed toothed detector bar 20 which may be conveniently supported in the upper portion ofthe side brackets 1, as more fully and passed through an opening 26 in the movable detector bar 18 where the threaded end of the pin is secured in place by a nut 27. The pin 23 has a barrel portion 28 which projects at one side of the movable toothed detector. bar 18, and mountedon the barrel portion 28 of the pin is the split sleeve29 which ,may be slightly less in width than the barrel portion 28 oi the pin, so that the stress of. the nut 27will maintain the end portion of the barrel 28 in binding engage ment with the side of the movable detector bar 18 without at the same time interfering with the spring qualities of the split spring sleeve 29. As hereinbefore indicated, the movable toothed detector bar 18 is connected to its associated actuator by a link, which, in the present instance of the invention, is provided with an opening 30, by which the link v31 is pivotally connected to its actuator 9.

The downturned end portion. 32 of the link 31 is provided" with an opening 33, the entrance to which at 3-;t is of less width than thedimensions of the split sleeve 29, with the result that when the open end portion of the'link 31 .isforced into engagement with the split sleeve,the latter willbe compressed in opposition to its spring qualities, and then slightly expand as the opening 33 of the link finally embraces the vsplit sleeve and effects a union between the link and the transversely movable toothed detector bar.

' WVhen the parts are in, assembled relation,

.as. indicated in Fig. v3, the, link is yieldingly locked to the transversely movable toothed detect-or bar 18, and to disengage the link from the detector bar considerable intentional force must be exerted on the link, the

result beingthat accidental or unintentional disengagement of the link from the movable tootheddeteotor bar is rendered substantially impossible.

lVhen the parts are to be assembled, as indicated in Fig. 3, the pin 23 is secured to the movable toothed detector bar 18 by the nut 27 which engages the threaded end of the pin, and the inner shoulder portion of the barrel 28 rests against the side of the toothed detector bar, as indicated in Fig. l, thus leaving the split spring sleeve 29 tree to the influence of its spring action, and yet compressible against such action as the narrow entrance 34 of the link 31 is forced downward over the split sleeve. lVhen the parts are in assembled relation, the split spring sleeve serves to effectively lock the link and movable toothed detector bar in thei associated relation and eil'cctively prevent any accidental disengagement oi. the two, thereby insuring against the weaving of imperfect clot-h. Should it be desired at any time to disconnect the link from its associated relation with the movable toothed detector bar, this result may be ellected by a forceful manual movement of the link, which thereupon compresses the split spring sleeve as the narrow entrance 34 of the open slot passes from engagement therewith.

It will be understood, of course, that the detector bars have associated therewith the usual drop wires .35 which are normally supported by the warp threads during weaving and effect loom stoppage on the occurrence of a warp fault, and, of course, any number of banks of drop wires and associated detector bars may be employed.

hat is claimed is:

1. In a warp stop mechanism for looms, the combination of drop wires, a trans versely movable toothed detector bar having a pin secured thereto and a. spring sleeve mounted on the pin and compressible in a direction to decrease its diameter, an actuator for the transversely movable detector bar, a link connected to the actuator at one end and having an open slot adapted to receive the spring sleeve and provided with a contracted entrance at its other end for compressing the spring sleeve as the link and pin are manually engaged.

2. In a warp stop mechanism for looms, the combination of drop wires, a transversely movable toothed detector bar, an actuator, a link for connecting the actuator and toothed detector bilr having an open slot, and a manually operable lock between the link and detector bar, comprising a pin secured to the detector bar, a split spring sleeve mounted on the pin and normally of greater size than the open slot of the link that the detector bar and link may be 1nanually locked and unlocked by forcing the opening into and out of embracing engagement with the sleeve.

3. In a warp stop mechanism for looms, the combination of drop wires, a transversely movable toothed detector bar, an

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actuator for said bar, a link pivoted at one end to the actuator and having an opening with a contracted entrance at the other end, a pin of less size than the contracted opening of the link, and a split spring sleeve of larger size than the entrance to said opening mounted on the pin and constituting a manually operable lock for connecting and disconnecting the toothed detector bar With its actuator.

4i. In a warp stop mechanism for looms, the combination of drop Wires, a transversely movable toothed detector bar, a pin secured thereto and having a barrel portion at one side of the detector bar, a split spring sleeve mounted on the barrel portion Off the pin, an actuator for the transversely movable detector bar, a link pivotally c011- nected to the actuator and having an opening provided With an entrance of less dia pin extended from the other of said parts having a barrel portion and a split spring sleeve thereon adapted to be ei'nhraced by said slot but having a larger dimension than the entrance to said slot and constituting a yielding and. manually operable lock for comiecting the link and pin.

In testimony whereof, I have signed my name to this specification.

IRA W. NOYES. 

